JPS55153019A - Diagnosing circuit for operation of digital output unit - Google Patents
Diagnosing circuit for operation of digital output unitInfo
- Publication number
- JPS55153019A JPS55153019A JP4433879A JP4433879A JPS55153019A JP S55153019 A JPS55153019 A JP S55153019A JP 4433879 A JP4433879 A JP 4433879A JP 4433879 A JP4433879 A JP 4433879A JP S55153019 A JPS55153019 A JP S55153019A
- Authority
- JP
- Japan
- Prior art keywords
- output
- gate
- load
- computer
- current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
PURPOSE: To make it possible to diagnose whether a load operates securely by answering back by detecting a current flowing through the load and then by sending it to a data bus via an input gate put into operation by a signal of a data read address.
CONSTITUTION: Once output data turns output transistor 4 ON, current I flows through load 5. Current I makes light-emitting diode 14 of photocoupler 13 to come on, turning transistor switch 14 ON. At this time, when a signal of data read address 10 is output from a computer to input gate 11, gate 11 generates "0". Namely, when output transistor 4 is in operation, output gate 11 outputs 0 and the computer reads this to decide normal operation; when output transistor 4 is OFF, output gate 11 outputs 1 and the computer never reads this, deciding a fault.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4433879A JPS55153019A (en) | 1979-04-13 | 1979-04-13 | Diagnosing circuit for operation of digital output unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4433879A JPS55153019A (en) | 1979-04-13 | 1979-04-13 | Diagnosing circuit for operation of digital output unit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55153019A true JPS55153019A (en) | 1980-11-28 |
Family
ID=12688720
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4433879A Pending JPS55153019A (en) | 1979-04-13 | 1979-04-13 | Diagnosing circuit for operation of digital output unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55153019A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5776448A (en) * | 1980-10-31 | 1982-05-13 | Toyota Motor Corp | Oxygen sensor element |
JPS62113253A (en) * | 1985-11-13 | 1987-05-25 | Nippon Signal Co Ltd:The | Output circuit for multisystem bus synchronization system |
-
1979
- 1979-04-13 JP JP4433879A patent/JPS55153019A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5776448A (en) * | 1980-10-31 | 1982-05-13 | Toyota Motor Corp | Oxygen sensor element |
JPH0114534B2 (en) * | 1980-10-31 | 1989-03-13 | Toyota Motor Co Ltd | |
JPS62113253A (en) * | 1985-11-13 | 1987-05-25 | Nippon Signal Co Ltd:The | Output circuit for multisystem bus synchronization system |
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